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/cvs/deliantra/server/ext/map-scheduler.ext
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Comparing deliantra/server/ext/map-scheduler.ext (file contents):
Revision 1.29 by root, Mon Feb 12 01:33:41 2007 UTC vs.
Revision 1.34 by root, Fri May 11 07:59:59 2007 UTC

… …
3# this extension swaps out maps and resets them, in essence managing 3# this extension swaps out maps and resets them, in essence managing
4# the reset/swap policy of the server. 4# the reset/swap policy of the server.
5# it also contains the map prefetching logic 5# it also contains the map prefetching logic
6 6
7#our $DEACTIVATE_TIMEOUT = 20; # number of seconds after which maps get deactivated to save cpu 7#our $DEACTIVATE_TIMEOUT = 20; # number of seconds after which maps get deactivated to save cpu
8our $SWAP_TIMEOUT = $cf::CFG{swap_timeout} || 40; # number of seconds after which maps inactive get swapped out 8our $SWAP_TIMEOUT = $cf::CFG{swap_timeout} || 300; # number of seconds after which inactive maps get swapped out
9our $SCHEDULE_INTERVAL = $cf::CFG{schedule_interval} || 5; # time the map scheduler sleeps between runs 9our $SCHEDULE_INTERVAL = $cf::CFG{schedule_interval} || .8; # time the map scheduler sleeps between runs
10our $SAVE_TIMEOUT = $cf::CFG{save_timeout} || 20; # save maps every n seconds 10our $SAVE_TIMEOUT = $cf::CFG{save_timeout} || 30; # save maps every n seconds
11our $MAX_ACTIVES = $cf::CFG{max_actives} || 200000; # swap aggressively when > this many objects are active 11our $SWAP_LOAD1 = $cf::CFG{swap_load1} || .1; # start aggressively swapping at this load
12our $SWAP_LOAD2 = $cf::CFG{swap_load2} || .4; # swap as fast as possible at this load
12 13
13cf::async_ext { 14cf::async_ext {
14 $Coro::current->prio (Coro::PRIO_MIN); 15 $Coro::current->prio (Coro::PRIO_MIN);
15 # load the header of swapped-out maps. 16 # load the header of swapped-out maps.
16 # this is not a correctness issue, it simply saves diskspace 17 # this is not a correctness issue, it simply saves diskspace
17 # because old files will get cleaned up on reset time 18 # because old files will get cleaned up on reset time
18 Coro::Timer::sleep 1; 19 Coro::Timer::sleep 1;
19 20
20 my $files = Coro::AIO::aio_readdir cf::localdir . "/" . cf::tmpdir; 21 my $files = Coro::AIO::aio_readdir $cf::TMPDIR;
21 22
22 for my $map (@$files) { 23 for my $map (@$files) {
23 utf8::decode $map; 24 utf8::decode $map;
24 next if $map =~ /\.(?:pst|meta)$/; 25 next if $map =~ /\.(?:pst|meta)$/;
25 cf::map::find $map; 26 cf::map::find $map;
26 $cf::WAIT_FOR_TICK_ONE->wait; 27 cf::wait_for_tick;
27 } 28 }
28 29
29 #TODO: should also preload random maps... 30 #TODO: should also preload random maps...
30}; 31};
31 32
32our $SCHEDULER = cf::async_ext { 33our $SCHEDULER = cf::async_ext {
33 my $schedule_interval = Coro::Event->timer (after => 1, interval => $SCHEDULE_INTERVAL);
34 while () { 34 while () {
35 $schedule_interval->next unless cf::object::actives_size > $MAX_ACTIVES; 35 Coro::Event::do_timer (after => $SCHEDULE_INTERVAL)
36 unless $cf::LOADAVG > $SWAP_LOAD2;
36 37
37 # this weird form of iteration over values is used because 38 # this weird form of iteration over values is used because
38 # the hash changes underneath us frequently, and for 39 # the hash changes underneath us frequently, and for
39 # keeps a direct reference to the value without (in 5.8 perls) 40 # keeps a direct reference to the value without (in 5.8 perls)
40 # keeping a reference, so this is prone to crashes or worse. 41 # keeping a reference, so this is prone to crashes or worse.
… …
52# delete $map->{active}; 53# delete $map->{active};
53# } 54# }
54 if ($map->should_reset) { 55 if ($map->should_reset) {
55 $map->reset; 56 $map->reset;
56 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { 57 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
57 my $max_idle = cf::object::actives_size > $MAX_ACTIVES ? 1 : $SWAP_TIMEOUT; 58 my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, 0), 0, $SWAP_TIMEOUT;
59
58 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) { 60 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
59 $map->swap_out; 61 $map->swap_out;
60 $cf::WAIT_FOR_TICK_ONE->wait unless $max_idle == 1; 62 cf::wait_for_tick unless $cf::LOADAVG > $SWAP_LOAD2;
61 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 63 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
62 $map->save; 64 $map->save;
63 $cf::WAIT_FOR_TICK_ONE->wait unless $max_idle == 1; 65 cf::wait_for_tick unless $cf::LOADAVG > $SWAP_LOAD2;
64 } 66 }
65 } 67 }
66 }; 68 };
67 warn $@ if $@; 69 warn $@ if $@;
68 Coro::cede; 70 cf::cede_to_tick;
69 }; 71 };
70 } 72 }
71}; 73};
72 74
73$SCHEDULER->prio (-2); 75$SCHEDULER->prio (-2);

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